Testing of the Blue steel, now here is one to put hairs on your chest..
"fall out of the sky (40,000 ft inverted supersonic spin)" in a Victor
The aircraft experienced maximums of about minus 3 and plus 5 G’s (more than airframe design limits), and the whole incident lasted about 60 secs with the descent from 46,000 to 16,000 in about 20 secs – vertically supersonic!
Victor Incident
Blue Steel